[lotusmars]

The sheer size of Russia combined with hyper centralization in Moscow is not sustainable.

Russian Federation is RSFSR left intact with its borders and regional partition.

Crushing parliament with tanks in 1993 left the country without any checks to presidential power.

Yeltsin constitution gave enormous power to president. For example he can introduce general attorney (the only one who can open investigation on president). Or judges of supreme and costitutional courts (that can introduce changes to constitution itself). Once you've got a puppet parliament, you're free to go, unchecked power.

All regions besides Moscow (or hyper loyal enclaves like Chechnya) are ruled by capital as colonies.

It's evident not only in Russian regions but also occupied territories of Ukraine and Crimea. The assets are quickly divided between Moscow, Chechen and local gangs. Dissent is crushed and voices are forever silenced.